Rocking-chair attachment



( No'ModelJ W. I. BUNKER. ROCKING CHAIR ATTACHMENT.

No. 405,340. Patented June 18, 1889.

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\VILLIAM I. BUNKER, OF LA GRANGE, ILLINOIS.

ROCKING-CHAIR ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 405,340, dated June 18,1889,

Original application filed September 9, 1887, Serial No. 249,270.Divided and this application filed January 12, 1889. Serial No. 296,169.(NomodeL) T at whom it may concern:

Be it known that 1, WILLIAM I. BUNKER, a citizen of the United States,residing at La Grange, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Rocking-Chair Attachments, forwhich I made application for Letters Patent September 9,1S87,Serial No.M9370, and of which the following is a divisional specification.

The object of my invention, which is an improvement upon the onedescribed in my patent of MarchJO, 1885, No. 313,707, is to make asimple, cheap, compressible spring attachment for platformrocking-chairs; and the invention consists in thefeatures andcombinations hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a vertical sectional elevationshowing one of the rockers and base-rails of a platform rocking-chairequipped with my attachment, the

' projecting part of the bracket within the coils extending downwardly;and Fig. 2 the same, except that such projecting part of the bracketextends upwardly.

, Ais the rocker; B, the base-rail; C, the connecting-spring; D, thebrackets, and cl the extendedportion of the brackets passing through thebody of the spring, and E the portion of the bracket receiving andholding the terminal coil of the spring.

My improved attachment consists, essentially, of a compressible spiralspring and suitable attaching-brackets, both the spring and brackets,preferably, having the characteristics presently mentioned.

The spring is of course of suitable dimensions and length to form theconnecting mediumbetween the rocker and base-rail, so that, two beingused, one at the inside of each rocker and base-rail, they will operateto connect and hold together the seat and baseplates of the chair. Thespring, which is open-coiled, so as to be readily compressed by therocking of the chair, is made longer at one side than at the other. Thismay be done by cutting both the end coils at the same side of thespring,or in any other convenient way.

The attaching brackets are of course adapted to be secured'to the endsof the spring and to the rocker and base-rail. One of them is providedwith an extended portion adapted to be passed up or down through thecoils or body of the spring, and this extended portion has suitablemeans for securing it to the end of the spring. I prefer to secure thebracket to the spring by means of suitable grooves or channels toreceive and hold the terminal coil of the spring; but of course otherways of securing the bracket and spring together may be used. Thebracket having the extended portion passed through the body of the coilsmay be secured to either the rocker or baserail, and its extendedportion Will then reach up or down and form a firm fastening or attachment for the opposite end of the spring that is, for the end of thespring below the line of contact between the rocker and baserail whenthe bracket is secured to the rocker, (see Fig. 1,) and for the end ofthe spring above such line of contact when the bracket is secured to thebase-rail. (See Fig. 2.) The other bracket, which may also be secured toeither the rocker or base-rail, extends outwardly and preferablyupwardly or downwardly to the extent necessary to enable it to beattached to the other end of the spring that is, the end to which theextended portion of the bracket above described is not attached. As inthe other case, this bracket may be connected with the spring in anysuitable wayas, for in stance, by suitable grooves or channels toreceive and hold its terminal coil.

The brackets are so formed as to permit the seat part of the chair torock farther backward than forward. This backward movement isaccomplished by having the spring longer at its front than at its rearside, as above described, and by beveling the bracket accordingly. Inthis way, the end coils of the spring snugly fitting and being held ordetained in the beveled portions of the bracket, the whole attachment islonger at its frontthan at its rear side when applied to the chair, and,as above stated, this permits the seat part of the chair to rock fartherbackward than forward. The brackets being properly attached to thesprings and to the rocker and base-rail of the chairone spring 'and setof brackets at-the inside of each rocker and baserailthe Wholeattachment serves to firmly and securely connect and hold the rockingand base parts of the chair together. I prefer to fasten the bracketsand spring together before applying them to the chair; but this is notnecessary.

The advantages of my invention are that it forms a Very simple,efficient, and economical attachment, and that it permits the seat partof the chair to rock farther backward than forward.

I claim 1. A platform rocking -chair attachment comprising acompressible spiral spring and two attaching-brackets, secured at theirends to the spring and having said ends farther apart at one side of thespring than at the other, substantially as described.

2. A platform rocking chair attachment comprising a compressible spiralspring longer at one side than the other and two attachingbracketsadapted to receive and hold the terminal coils of the spring,substantially as described.

WILLIAM I. BUNKER. WVitnesses:

EPHRAIM BANNING, H. A. FARNHAM.

